Mechanical Weeding Depth and Inclination Control on Soft Paddy Ground

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Solution Overview

Problem

Mechanical weeding in paddy fields is hindered by ground inclination and sinking, leading to reduced weeding quality, seedling damage, and weeding omission due to uneven soil hardness and soft ground conditions, which existing technologies fail to adequately address.

Innovation Solution

A ground inclination stereo profiling apparatus and method for mechanical weeding components, incorporating a rack assembly, operation depth and inclination intelligent perception feedback system, hydraulic depth adjusting system, motor assembly, and control assembly, utilizing depth synchronous crank-slider and inclination synchronous crank-connecting rod mechanisms, along with fuzzy PID control strategies to maintain stable tilling depth and horizontal inclination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If mechanical weeding is performed on uneven and soft ground, then weed removal capability is improved, but the weeding component becomes inclined and sinks, reducing weeding quality

Engineering Contradiction:

Improveweed removal capabilityVSAvoidweeding quality

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent implements a dynamic depth adjustment mechanism that allows the weeding component to adapt its working depth in real-time based on ground conditions. The hydraulic cylinder enables continuous adjustment of the weeding component's position, transforming the static system into a dynamic one that can respond to varying ground hardness and inclination, thereby maintaining consistent weeding quality while operating on uneven terrain

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs angle sensors to detect the inclination angle of the weeding component and provides feedback to the control system. This feedback mechanism enables the system to monitor its own state and automatically adjust the weeding depth through the hydraulic cylinder to compensate for inclination, ensuring consistent weeding quality despite ground unevenness

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If the weeding component operates on soft ground, then ground adaptability is improved, but the component sinks and loses parallelism with the ground, causing seedling damage

Engineering Contradiction:

Improveground adaptabilityVSAvoidseedling damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The hydraulic depth adjusting system provides dynamic control of the weeding component's working depth, allowing real-time adaptation to soft ground conditions. This dynamic adjustment capability enables the system to maintain optimal working depth even when operating on variable ground firmness, preventing excessive penetration that would cause seedling damage while still adapting to soft ground

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The angle sensor continuously monitors the inclination of the weeding component and provides feedback to the control assembly. When the sensor detects excessive inclination that would lead to seedling damage, the control system automatically adjusts the hydraulic cylinder to correct the depth, preventing harmful effects while maintaining ground adaptability

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If different tilling depths are used for different soil hardnesses, then soil adaptability is improved, but inclination of the weeding component occurs, reducing weeding precision

Engineering Contradiction:

Improvesoil adaptabilityVSAvoidweeding precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The angle sensor provides real-time feedback on the inclination angle of the weeding component. When different tilling depths are required for different soil hardnesses, the feedback system detects any resulting inclination and triggers automatic depth adjustment through the hydraulic cylinder, maintaining weeding precision while preserving soil adaptability

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual depth adjustment mechanisms with an automated hydraulic control system. The control assembly uses electronic signals from angle sensors to automatically regulate the hydraulic cylinder, substituting mechanical manual adjustment with an automated control system that maintains precision while allowing adaptability to different soil conditions

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11980133B2Ground inclination stereo profiling apparatus and method for mechanical weeding component

Publication Date: 2024.05.14 NANJING AGRI MECHANIZATION INST MIN OF AGRI

AI summary

The present invention discloses a ground inclination stereo profiling apparatus and method for a mechanical weeding component, and relates to the field of green agriculture. The ground inclination stereo profiling apparatus for the mechanical weeding component includes a rack assembly, an operation depth and inclination intelligent perception and feedback system, a hydraulic depth adjusting system and a control assembly. The operation depth and inclination intelligent perception and feedback system includes a depth synchronous crank-slider mechanism and an inclination synchronous crank-connecting rod mechanism for synchronously transmitting a depth change and horizontal inclination information of the weeding component; the control assembly includes a processor, a first angle sensor and a second angle sensor; the processor controls the hydraulic depth adjusting system and the motor assembly; and the hydraulic depth adjusting system conducts depth adjustment on the weeding component through a hydraulic cylinder.